How to fix PC turning ON by itself?

If your computer is turning on by itself, this can serve as a signal that some settings have been modified in the system. In most cases, this problem occurs because of the activated Quick Boot feature, After AC Power failure, or the option to awake the PC from the sleep mode with a device. In this article, we’ll show you how to disable these options so that your computer stops turning on unnecessarily.

Method # 1 Disabling the waking up the computer from the sleep mode feature

Now we will describe a method that resolve problem with your PC turning itself. However, it would be nice to determine which element in the system is supplying power to the device without your knowledge. You can do this using the Command line.

  • Click RMB on the Start menu and select “Command Prompt (Administrator)” from the shortcut menu.
  • Once the Command line appears on the screen, enter the command powercfg -lastwake into it and press Enter. It will tell you what exactly triggers your computer.
  • Type in the command line powercfg -devicequery wake_from_any and press Enter to list the devices that can start the PC. Only active ones can do this.
  • To determine such devices, type in the command powercfg -devicequery wake_armed and press Enter.

In the Command line you will be told exactly which of the devices your computer can turn on to turn on. Next you need to do the following:

  • Click RMB on the Start menu and select “Device Manager”.
  • Open the section where the problem device will be located.
  • Click on it and select Properties.
  • Go to the Power Management tab.
  • Uncheck the option “Allow this device to wake the computer from the sleep mode”.
  • Confirm the changes and close the window.

Method # 2 Disabling Quick Boot

This feature allows you to reduce time to boot operating system on your computer. However, often, the Quick Boot feature creates some alternative problems. For example, it can include a computer without the user’s knowledge. To disable this feature, do the following:

  • Press RMB on the Start menu and select “Power Management”.
  • In the opened window, click on the link “Additional power settings”.
  • Click on the “Actions of the power buttons” link.
  • As soon as you move to the selected window, you will see that the Quick Boot feature is enabled, but not available for your intervention (grayed out). To access this function, you need to click on the link “Change the settings that are currently unavailable”.
  • After moving to another window, uncheck the Quick Boot option. Apply the changes to the power plan and save them.

Method # 3 Disabling After AC Power failure

  • As soon as you enter the BIOS (by pressing the specified buttons on the screen while the computer boots), go to Power or Advanced sections.
  • Find the After AC Power failure option in the opened tab. If its value is set to stay on, then change it to stay off.
  • After disabling this feature, save changes in the BIOS.
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